Edge protection structure of vertical storage tank

Abstract

The utility model discloses an edge protection structure of a vertical storage tank, which belongs to the technical field of corrosion prevention of storage tanks and comprises a first anti-corrosion coating arranged on the outer surface of a storage tank wall and the surface of a storage tank edge plate and a second anti-corrosion coating arranged on the surface of a storage tank base. Flexible sealing mud layers are arranged on the surfaces of the first anti-corrosion coating and the second anti-corrosion coating; anti-corrosion belt layers are arranged on the surfaces of the flexible sealing mud layer and the first anti-corrosion coating; hard protective layers are arranged on the outer surface of the storage tank wall, the surface of the anti-corrosion belt layer and the surface of the storage tank base. The first anti-corrosion coating and the second anti-corrosion coating are connected at the connecting edge of the storage tank edge plate and the storage tank base, so that gaps are avoided, the first anti-corrosion coating and the second anti-corrosion coating are sealed through the flexible sealing mud layer, and the flexibility of the whole structure is improved; the outmost layer improves the impact resistance of the whole structure through the hard protective layer, and the strength of the whole structure is improved.

Description

Technical Field

[0001] The utility model relates to a vertical storage tank edge protection structure and belongs to the technical field of storage tank anticorrosion. Background Art

[0002] Corrosion is the main form of failure of storage tanks. According to statistics, nearly 50% of the corrosion sites of vertical storage tanks occur in the edge plates, and corrosion of the edge plates is the main cause of perforation of storage tanks. Perforation means leakage of materials, which may lead to safety accidents. It can be said that corrosion of the edge plates of storage tanks is the main factor threatening the safety of the tank. Usually, it is difficult for the edge plates of storage tanks to be tightly combined with the concrete base, and there will be gaps; temperature changes may cause the edge plates of storage tanks to shift in three dimensions, resulting in a certain gap between the edge plates and the concrete base; in addition, when the storage tank is loaded, the outer edge plate of the tank bottom will expand the tank body in the horizontal direction due to the hydraulic action, and the concrete base cannot adapt to this deformation. After the storage tank is unloaded, the edge plate cannot completely return to its original state and will warp upwards. The resulting upward deformation will cause the gap between the outer edge plate of the tank bottom and the concrete base to gradually expand. The gaps caused by these reasons will make it easy for water, steam, oxygen, microorganisms and corrosive media to invade the bottom of the tank edge plate, causing corrosion through chemical and electrochemical reactions. As the corrosion becomes more serious, the edge plate will suffer large-scale corrosion, which will cause the tank to be unable to be used normally. In severe cases, it may easily cause major accidents.

[0003] At present, the anti-corrosion methods for tank edge plates at home and abroad usually include epoxy coal tar patch, oil asphalt grouting or asphalt sand coating, modified rubber asphalt, elastic polyurethane, anti-corrosion coating, petrolatum oil belt, etc., but these methods face many problems and are difficult to achieve the expected results. For example, epoxy coal tar patch has defects in weather resistance and ductility, poor aging resistance, and shrinkage, cracking and damage after long-term operation; asphalt grouting or asphalt sand coating has the characteristics of hot flow and cold brittleness of asphalt, which is prone to cracking and seaming, and cannot effectively prevent water intrusion, and is difficult to clean during maintenance; modified rubber asphalt has poor aging resistance and insufficient bonding strength; elastic coatings such as elastic polyurethane have complex construction processes, insufficient weather resistance, and difficult to control raw materials and construction quality. They are prone to bubbling, brittleness, cracking, powdering, and large-scale In addition, the elastic coating has too strong adhesion to steel and cement. When the edge plate and cement ring beam are deformed, the anti-corrosion layer is subjected to long-term shear stress, resulting in cracking. In the process of anti-corrosion, the paint film of the anti-corrosion coating has micropores, which is easy to age under long-term immersion in sediment water, and cracking and peeling will occur. When the petrolatum oil tape is used alone, the petrolatum primer used to paste the petrolatum oil tape has insufficient adhesion, and there are overlaps and joints during construction, which are prone to delamination and peeling, especially the upper end of the petrolatum oil tape pasted to the tank wall is very easy to fall off under wind and rain for a long time. In summary, relying on traditional methods, it is impossible to effectively control and protect the corrosion of the edge plate area of ​​the tank, which is a difficult and important part of the anti-corrosion project. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a vertical tank edge protection structure with strong corrosion resistance, flexibility and rigidity, solving the problem that the current anti-corrosion method of the tank edge plate is prone to cracks and aging.

[0005] In order to achieve the above-mentioned purpose / solve the above-mentioned technical problem, the utility model is implemented by adopting the following technical scheme: a vertical tank edge protection structure, comprising a first anti-corrosion coating arranged on the outer surface of the tank wall and the surface of the tank edge plate and a second anti-corrosion coating arranged on the surface of the tank base; the first anti-corrosion coating and the second anti-corrosion coating are connected at the connecting edge of the tank edge plate and the tank base;

[0006] A flexible sealing mud layer is provided on the surfaces of the first anti-corrosion coating and the second anti-corrosion coating;

[0007] The flexible sealing mud layer and the first anti-corrosion coating surface are provided with an anti-corrosion tape layer;

[0008] The outer surface of the tank wall, the surface of the anti-corrosion belt layer and the surface of the tank base are provided with a hard protective layer.

[0009] Optionally, one end of the rigid protective layer extends to the tank wall, and the other end extends to one side of the tank base, thereby improving the connection strength of the rigid protective layer.

[0010] Optionally, the width of the hard protective layer on the tank wall and the tank base is not less than 50 mm.

[0011] Optionally, the connecting edge between the tank wall and the first anti-corrosion coating, and the connecting edge between the first anti-corrosion coating and the anti-corrosion tape layer are covered by a hard protective layer to form a first wrapping portion; the connecting edge between the tank base and the second anti-corrosion coating, and the connecting edge between the second anti-corrosion coating and the anti-corrosion tape layer are covered by a hard protective layer to form a second wrapping portion, thereby improving the sealing of the hard protective layer.

[0012] Optionally, the thickness of the first wrapping portion and the second wrapping portion is not less than 2 mm.

[0013] Optionally, a spirally superimposed and wound reinforcement belt is provided inside the hard protective layer to improve the strength of the hard protective layer.

[0014] Optionally, the flexible sealing mud layer is sloped, and the height of the flexible sealing mud layer decreases in a direction away from the storage tank, so as to better adapt to the deformation of the tank body.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The utility model directly performs anti-corrosion on the outer surface of the tank wall, the surface of the tank edge plate and the surface of the tank base through the first anti-corrosion coating and the second anti-corrosion coating. The first anti-corrosion coating and the second anti-corrosion coating are connected at the connecting edge of the tank edge plate and the tank base to avoid the generation of gaps. The first anti-corrosion coating and the second anti-corrosion coating are sealed with a flexible sealing mud layer to improve the flexibility of the overall structure and adapt to the deformation of the tank body. The anti-corrosion belt layer is then used to enhance the anti-corrosion performance and protect the flexible sealing mud layer. The outermost layer uses a hard protective layer to improve the impact resistance of the entire structure, improve the overall structural strength, avoid corrosion damage to the inner structure due to surface structure damage, and solve the problem that the current anti-corrosion method of the tank edge plate is prone to gaps and aging;

[0017] 2. The utility model improves the connection strength between the hard protective layer and the tank surface and tank base by extending the hard protective layer on the tank wall and the tank base and forming the first covering part and the second covering part, while protecting the edge of the inner structure and improving the sealing and protective integrity of the hard protective layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of a vertical storage tank edge protection structure provided by an embodiment of the utility model.

[0019] In the figure: 1. storage tank; 2. storage tank edge plate; 3. storage tank base; 4. first anti-corrosion coating; 5. second anti-corrosion coating; 6. flexible sealing mud layer; 7. anti-corrosion belt layer; 8. hard protective layer; 9. first wrapping part; 10. second wrapping part; 11. reinforcement belt. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0021] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances. Example

[0023] like Figure 1 As shown, a vertical tank edge protection structure includes a first anti-corrosion coating 4 laid on the outer surface of the tank wall of the tank 1 and the surface of the tank edge plate 2 and a second anti-corrosion coating 5 laid on the surface of the tank base 3, wherein the tank base 3 is a concrete base; the first anti-corrosion coating 4 and the second anti-corrosion coating 5 are connected at the connecting edge of the tank edge plate 2 and the tank base 3, thereby improving the anti-corrosion sealing performance; in this embodiment, the first anti-corrosion coating 4 adopts a high-viscosity petrolatum anti-corrosion coating, and the second anti-corrosion coating 5 adopts an asphalt anti-corrosion coating;

[0024] A flexible sealing mud layer 6 is laid on the surface of the first anti-corrosion coating 4 and the second anti-corrosion coating 5; specifically: the flexible sealing mud layer 6 is laid starting from the connecting edge of the tank wall 1 and the tank edge plate 2, wherein the flexible sealing mud layer 6 is sloped and gradually decreases in height from left to right until it covers the right edge of the tank base 3, which can prevent water, oxygen, microorganisms and corrosive media from entering the gap between the tank edge plate 2 and the tank base 3, while ensuring sealing, it also improves the flexibility of the overall structure, and can better adapt to the deformation of the tank body of the tank 1, and is also conducive to drainage; in this embodiment, the flexible sealing mud layer 6 is laid with flexible non-solidified glue.

[0025] An anti-corrosion tape layer 7 is provided on the surface of the flexible sealing mud layer 6 and the first anti-corrosion coating 4; specifically: the anti-corrosion tape layer 7 is laid from the right end of the tank base 3 until it covers the left end of the first anti-corrosion coating 4, and the anti-corrosion property is enhanced by the anti-corrosion tape layer 7 and the flexible sealing mud layer 6 is protected; in this embodiment, the anti-corrosion tape layer 7 adopts a petrolatum anti-corrosion tape.

[0026] A hard protective layer 8 is laid on the outer surface of the tank wall of the storage tank 1, the surface of the anti-corrosion tape layer 7 and the surface of the tank base 3; specifically: the left end of the hard protective layer 8 extends to the tank wall of the storage tank 1, and the right end extends to the right side of the tank base 3, wherein the width of the hard protective layer 8 extending on the tank wall of the storage tank 1 and the tank base 3 is not less than 50 mm, thereby improving the connection strength of the hard protective layer 8;

[0027] The connecting edges of the tank wall of the storage tank 1 and the first anti-corrosion coating 4, and the connecting edges of the first anti-corrosion coating 4 and the anti-corrosion tape layer 7 are covered by a hard protective layer 8 to form a first wrapping portion 9; the connecting edges of the tank base 3 and the second anti-corrosion coating 5, and the connecting edges of the second anti-corrosion coating 5 and the anti-corrosion tape layer 7 are covered by a hard protective layer 8 to form a second wrapping portion 10; the first wrapping portion 9 and the second wrapping portion 10 improve the connection strength between the hard protective layer 8 and the surface of the storage tank 1 and the storage tank base 3, while protecting the edge of the inner structure, thereby improving the sealing and protective integrity of the hard protective layer 8, wherein the thickness of the first wrapping portion 9 and the second wrapping portion 10 is not less than 2 mm; the outermost layer uses the hard protective layer 8 to improve the impact resistance of the entire structure, improve the overall structural strength, and avoid corrosion damage to the inner structure due to damage to the surface structure.

[0028] In order to improve the strength of the hard protective layer 8, a spirally superimposed and wound reinforcement belt 11 is also arranged inside the hard protective layer 8. The mud-like composite material is applied to the outer surface of the tank wall of the tank 1, the surface of the anti-corrosion belt layer 7 and the surface of the tank base 3, and then the reinforcement belt 11 is set on the spread mud-like composite material, and then the mud-like composite material is further applied on the surface of the reinforcement belt 11. After the mud-like composite material is cured, the hard protective layer 8 is formed.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A vertical tank edge protection structure, characterized in that: It includes a first anti-corrosion coating disposed on the outer surface of the tank wall and the surface of the tank edge plate and a second anti-corrosion coating disposed on the surface of the tank base; the first anti-corrosion coating and the second anti-corrosion coating are connected at the connection edge of the tank edge plate and the tank base; A flexible sealing mud layer is provided on the surfaces of the first anti-corrosion coating and the second anti-corrosion coating; The flexible sealing mud layer and the first anti-corrosion coating surface are provided with an anti-corrosion tape layer; The outer surface of the tank wall, the surface of the anti-corrosion belt layer and the surface of the tank base are provided with a hard protective layer.

2. The vertical tank edge protection structure according to claim 1 is characterized in that: One end of the hard protective layer extends to the tank wall, and the other end extends to one side of the tank base.

3. The vertical tank edge protection structure according to claim 2 is characterized in that: The width of the rigid protective layer on the tank wall and the tank base is not less than 50 mm.

4. The vertical storage tank edge protection structure according to claim 1, characterized in that: The connecting edge between the tank wall and the first anti-corrosion coating, and the connecting edge between the first anti-corrosion coating and the anti-corrosion tape layer are covered by a hard protective layer to form a first wrapping portion; the connecting edge between the tank base and the second anti-corrosion coating, and the connecting edge between the second anti-corrosion coating and the anti-corrosion tape layer are covered by a hard protective layer to form a second wrapping portion.

5. The vertical storage tank edge protection structure according to claim 4, characterized in that: The thickness of the first wrapping portion and the second wrapping portion is not less than 2 mm.

6. The vertical storage tank edge protection structure according to claim 1, characterized in that: A spirally superimposed and wound reinforcement belt is arranged inside the hard protective layer.

7. The vertical storage tank edge protection structure according to claim 1, characterized in that: The flexible sealing mud layer is in a slope shape, and the height of the flexible sealing mud layer decreases in a direction away from the storage tank.

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